Hamlet talks about revenge several times in the play and it begins when the ghost of his father is wandering around the castle. The ghost and hamlet talk alone and his father tells him that he must avenge him by killing his uncle.
GHOST: Revenge his foul and most unnatural murder.
HAMLET: Murder!
GHOST: Murder most foul, as in the best it is; But this most foul, strange and unnatural.
HAMLET: Haste me to know't, that I, with wings as swift as meditation or the thoughts of love, May sweep to my revenge.
This is before Hamlet knows that the man he must kill is Claudius. He is very enthusiastic and motivated to kill whoever killed his father, but that is not biblically justifiable. Romans 12:19 says, Do not take revenge, my dear friends, but leave room for God's wrath, for it is written: "It is mine to avenge; I will repay," says the Lord. This is very clear by saying that the Lord will avenge it is not our duty. Even if Claudius is above the law it is still unjustifiable because God is above everybody. God also commands us to honor our parents and Claudius is technically Hamlets father. Ephesians 6:2 says, 1Children, obey your parents in the Lord, for this is right. Honor your father and mother (which is the first commandment with a promise), 3so that it may be well with you, and that you may live long on the earth. God promises us a long life if we honor our parents and Hamlet ends up killing his father-in-law and Hamlet dies right after. The Bible is clear on its stand against murder by saying in Leviticus 24:17 that 17 “Whoever takes a human life shall surely be put to death. 18 Whoever takes an animal's